Hot water heating boiler



y 3, 1966 J. L. CURREN 3,249,093

HOT WATER HEATING BOILER Filed Jan. 11, 1965 5 Sheets-Sheet 1 John Leo Cw re n May 3, 1966 J. L. CURREN HOT WATER HEATING BOILER 3 Sheets-Sheet 2 Filed Jan. 11, 1965 INVENTOR. John LeoCurren May 3, 1966 J. 1.. CURREN HOT WATER HEATING BOILER 3 Sheets-Sheet 5 Filed Jan. 11. 1965 INVENTOR. John Leo C urr'en United States Patent HOT WATER HEATING BOILER John Leo Curl-en, 705 W. 19th St., Wilmington, Del. 19801 Filed Jan. 11, 1965, Ser. No. 424,481 4 Claims. (Cl. 122-176) This invention relates to a novel hot water heating boiler.

An object of this invention is to provide a highly eflicient boiler suitable for use in furnaces and other heating units. Another object is to provide a boiler in which the elements exposed to the source of heat can be easily cleaned. Still another object of this invention is to design a boiler requiring minimum floor space.

The objects are accomplished by a hot water boiler, which consists primarily of (a) two vertically disposed chambers, one having an inlet near the bottom, and the other with an outlet at the top; (b) a series of horizontal disposed tubes with their open ends sealed into said vertically disposed chambers to permit the flow of water from the return chamber (first chamber mentioned above) to the supply chamber (second chamber mentioned above), these said tubes being staggered so that some are connected to the chambers at a higher position than others: (c) and side and end assembly sections, fully insulated and jacketed, at least one of the two side assemblies being readily removable without disturbance of the remaining side or end assemblies, for the purpose of cleaning.

In its preferred embodiment, the boiler contains ((1) a smoke dome cap extending across the top of the boiler and resting on flared sections of tube sheets (referred to below), and the tops of the side jacketed assemblies. This smoke dome cap contains a multiplicity of outlets, for the purpose of inducing a uniformity in the travel of hot gases ascending through the spaces of the heating tubes.

These and other features of the invention are illustrated in the drawings wherein:

FIGURE 1 is a top view of the boiler, minus smoke dome cap.

FIGURE 2 is a side elevation of the boiler, with side, and end insulated and jacketed assemblies removed.

FIGURE 3 is a cross sectional view into return chamber as along lines 3 and 3 in FIGURE 2.

FIGURE 4 is a cross sectional view of supply chamber looking down as along lines 4 and 4 in FIGURE 2.

In the drawing of FIGURE 1 there is shown two vertical chambers, the return chamber being designated 1 and the supply chamber being designated 1', two flared tube sheets designated 4 and 4' attached to each of said chambers, a series of horizontal tubes, designated 3 interconnecting the vertical chambers 1 and 1, and attached into the said two tube sheets 4 and 4, and said tube sheets into the two vertical chambers 1 and 1 as fully shown and explained in drawings of FIGURES 2-3 and 4.

FIGURE 2 shows side elevation view of the boiler of the invention, without the two side, or two insulated and jacketed end assemblies. This drawing consists of the two vertical chambers 1 and 1, the return chamber being designated 1, and the supply chamber being designated 1, as series of interconnecting tubes 3 extending from chamber to chamber, flame area 14, the bottom row of tubes 3 to be above point of flame impingement, said tubes 3 extending into and through said tube sheets 4 and 4' and welded thereto, these tube sheets 4 and 4 are welded to the vertical and horizontal cut out sections of the respective chambers 1 and 1'. By this manner and method is formed the unit type construction of chambers. No other attachment or attachments are needed ice in forming these chambers. The top flared sections of said tube sheets 4 and 4' function as a partial resting pad for the smoke dome cap 5, this said cap having a plurality of outlets, and the combination of the four flared sections of said tube sheets 4 and 4', function to house the insulated and jacketed side assemblies 12 and 12. The bottom of each of the said chambers has attached by welding, an adaptable floor plate 18, and there exists a draw off connection 15 near the base of the supply chamber 1'.

FIGURE 3 is a cross sectional view along lines 33 as in drawing of FIGURE 2. Shown is the afore mentioned smoke dome cap 5 resting top flared section of tube sheet 4 arrangement of rows of horizontal tube 3, these rows of tubes being inclined, with adjacent rows of tubes being oppositely inclined, the limiting sides of the hot gas passageway as established by the vertical rows of bolts 6, the directional travel of the hot gases 17 ascending upward, around, and through the tube spaces. The hot gases in their ascent are subjected to a partial baflling by the close proximity of alternate rows of tubes in relation to the sides of the passageway, thereby in turn develop a partial tendency to deflect to the other end of tube row, due to greater proximity of tubes from opposite side of the hot gas passageway. Side assemblies 12 and 12 consisting of a metal housing forming the outside limits of the hot gas passageway, completely housing hi-temp insulation, outside finished jackets 3, aligning angles 10, method of bolt attachment 9 to assemblies 12 and 12, and functional use of eye bolts 11 for retention of insulation and side finished jackets 8.

FIGURE 4 shows end assembly 16 consisting of insulation retained in position by the curved and flared outside finished jacket, arrangement of tubes 3 into tube sheets 4 and 4 by welding, tube sheet 4 and 4' welded to vertical chambers 1 and 1 also by welding, method and means of attaching tap screws 7 into tube sheets 4 and 4' for the purpose of retention of end insulated and jacketed assemblies 16, and vertical rows of bolts 6 that function to retain side insulated and jacketed side assemblies 12 and 12. With the removal of bolts 6, the side insulated and jacketed assemblies are totally removable, thereby exposing the complete heating area of the boiler for cleaning, inspection, or repairs, while the retention of tap screws 7 allows the insulated and jacketed end assemblies 16 to remain in their relative positions fully intact.

When the boiler is placed in operation, the chambers and tubes are filled with water, and the inlet and outlet chambers are connected with water filled radiation, or other elements it is desired to heat. The boiler is heated by gas from the flame area. The heat output, and the number of tubes are so chosen, that a high percentage of the heat applied is absorbed in the boiler tubes.

The length and diameter of the heating tubes can be varied greatly, depending upon the size of the boiler. In a given boiler, however, the tubes will normally be of the same size. Similarly the size of the end chambers, to which the tubes are attached, will depend on the overall size and capacity of the boiler. The ratio of the cross sectional dimension or volume of the chamber to the diameter or overall volume of the heating tubes is not critical. However, for economy of space and materials the size of the chambers will be kept within limits, consistent with the size required for insertion and spacing of the tubes, and for ready flow of water, or other heat transfer liquid, from chamber to chamber. The wo chambers preferably are of the same volume and shape, since this facilitates attachment of the side assemblies, and smoke dome cap. The inlet and outlet openings to the chambers are of the same size.

The boiler in this invention has the following features and advantages:

(a) Designed for simplicity of manufacture.

(b) Elimination of undue stresses or strains in the boiler proper.

(c) Has a very high B.t.u. capacity per unit Weight.

((1) Ease of cleaning.

In so far as I am aware, no other boiler has these advantages, at least not to an equal degree. The manner of cleaning this boiler is novel in itself. With the re moval of bolts (not tapscrews) from one side of the boiler, the complete side assembly section is lifted out, exposing all of the heating tubes in their entire length. Reassembly of the side section is accomplished by placing assembly in position and replacing removed bolts.

Although the boiler of this invention has been described as a hot water heating boiler, and with the particular reference to the use of water as the heat transfer medium, it will be apparent that other inert liquids which are not too volatile, e.g., ethylene glycol, chlorinated hydrocarbons, ethylene glycol/water mixtures, can be used.

The boiler has been described in its more simple form. It is within the scope of this invention to include all refinements, internal or external of the boiler proper, which are part or parcel of any phase of hot water heating, and covering the field of domestic hot water service.

Having now described the invention in specific detail, and exemplified the manner in which it may be carried into practice, it will be readily apparent to those skilled in the art that innumerably variations, modifications, applications, and extensions of the basic principles involved may be made without departing from its spirit and scope.

What is claimed is:

1. A boiler for heating hot water, comprising two spaced vertically disposed chambers, an inlet connected adjacent the bottom of one of said chambers, an outlet connected at the top of the other of said chambers, side assembly sections connected to said vertically disposed chambers, said assembly sections being spaced from each other, said side assembly sections and said chambers defining a vertical gas fiow passage, means supply heat in gases to the lower portion of said passage, flue outlet means in the upper portion of said passage, a plurality of vertically spaced rows of horizontal tubes interconnecting said chambers, each of said vertically spaced rows of horizontal tubes being inclined, adjacent rows of said tubes being oppositely inclined, the tubes of each row being spaced from each other and from said side assembly sections, means spacing the rows of tubes from the side assembly sections to cause the gases to flow in a uniform pattern over and transverse of each succeeding row of tubes, means supporting insulation on each assembly section, means removably mounting at least one of side assemblies and its insulation as a unit for the purpose of cleaning.

2. The boiler of claim 1, in which the horizontal tubes, and the vertical chambers are constructed of copper.

3. The boiler of claim 1 wherein the horizontally disposed tubes are of the same size and wherein the inlet and outlet to the vertically disposed chambers are of the same size.

4. The boiler in claim 1, wherein said flue outlet means comprises a fume dome cap having a plurality of openings.

References Cited by the Examiner UNITED STATES PATENTS 6,929 12/1849 Trembley 122-367 X 575,338 l/1897 De Muth et al. 122176 667,326 2/1901 Leightham 122l76 708,729 9/1902 Penman 122l76 1,977,411 10/1934 Smith 122-177 2,828,723 4/1958 Miller 122--264 3,134,366 4/1964 Miller 122-407 FOREIGN PATENTS 297,608 9/ 1928 Great Britain.

KENNETH W. SPRAGUE, Primary Examiner. FREDERICK L. MATTESON, JR., Assistant Examiner. 

1. A BOILER FOR HEATING HOT WATER, COMPRISING TWO SPACED VERTICALLY DISPOSED CHAMBERS, AN INLET CONNECTED ADJACENT THE BOTTOM OF ONE OF SAID CHAMBERS, AN OUTLET CONNECTED AT THE TOP OF THE OTHER OF SAID CHAMBERS, SIDE ASSEMBLY SECTIONS CONNECTED TO SAID VERTICALLY DISPOSED CHAMBERS, SAID ASSEMBLY SECTIONS BEING SPACED FROM EACH OTHER, SAID SIDE ASSEMBLY SECTIONS BEING SPACED FROM EACH DEFINING A VERTICAL GAS FLOW PASSAGE, MEANS SUPPLY HEATIN GASES TO THE LOWER PORTION OF SAID PASSAGE, FLUE OUTLET MEANS IN THE UPPER PORTION OF SAID PASSAGE, A PLURALITY OF VERTICALLY SPACED ROWS OF HORIZONTAL TUBES INTERCONNECTING SAID CHAMBERS, EACH OF SAID VERTICALLY SPACED ROWS OF HORIZONTAL TUBES BEING INCLINED, ADJACENT ROWS OF SAID TUBES BEING OPPOSITELY INCLINED, THE TUBES OF EACH ROW BEING SPACED FROM EACH OTHER AND FROM SAID SIDE ASSEMBLY SECTIONS, MEANS SPACING THE ROWS OF TUBES FROM THE SIDE ASSEMBLY SECTIONS TO CAUSE THE GASES TO FLOW IN A UNIFORM PATTERN OVER AND TRANSVERSE OF EACH SUCCEEDING ROW OF TUBES, MEANS SUPPORTING INSULATION ON EACH ASSEMBLY SECTION, MEANS REMOVABLY MOUNTING AT LEAST ONE OF SIDE ASSEMBLIES AND ITS INSULATION AS A UNIT FOR THE PURPOSE OF CLEANING. 